Question

I have this wonderful piece of code from here

But if some one edits the form through firebug or disable the js then this wont work, I want to have server side validation for this function, can anyone direct me to the right path please

Answer 1

The following php code will give you the number of new lines in the text data:

echo substr_count(nl2br($textdata), '<br />') + 1;

the use of nl2br() is to support the different new lines formats (\r\n, \n\r, \n y \r)

Test:

$textdata = 'First line
second line
third line
fourth line';

$lines = substr_count(nl2br($textdata), '<br />') + 1;
echo $lines; //will output 4